Since being launched in 2009, Tesla's all-electric Roadster has had the same effect on green-minded motorists that Elvis Presley had on American teenagers with his 1956 appearance on The Ed Sullivan Show .. But Tesla's mojo has hit a rough patch since the broadcast of an episode of the BBC's mega-hit television car programme Top Gear , in which green-hating host Jeremy Clarkson concluded that the Roadster does not do what it says on the tin..